Spray gun



July 6, 1943. o. OTTOSON 2,323,618

SPRAY GUN Filed May 23, 1940 Elm Oscar 01705017.

Patented July 6, 1943 UNITED STATES PATENT OFFICE SPRAY GUN OscarOttoson, Bronx, NY. Application May 23, 1940, Serial No. 336,838

1 Claim.

This invention'relates to an improved spray gun and has for one of itsobjects to provide a device of this character which may be usedeffectively for killing insects on plants, trees and the like.

. A further object of the invention is to provide a spray gun which willbe operated by water pressure from a hose, which pressure will forceboth water and a spraying solution through the nozzle employed.

A further object of the invention is to provide a spray gun employingmeans for varying the amount of water in the mixture of Water andspraying solution to be forced through the nozzle.

A still further object of the invention is to provide a spray gunwherein water pressure will serve a two-fold purpose, i. e., that offorcing the spraying solution from the container employed and that ofmixing water with said spraying solution, inwardly of the nozzle, forregulating the strength of said solution.

And still another object of the invention is to provide a gun of thetype set forth wherein the barrel employed has positioned therein amixing element which will be effective for assuring thorough mixing ofwater and spraying solution preliminary to the spraying thereof from thenozzle.

Other objects of the invention, not specifically mentioned hereinbefore,will become apparent during the course of the following description.

In the drawing:

a Figure 1 is a longitudinal sectional view of my improved spray gun onthe line ll of Figure 2,

Figure 2 is a top plan view of the device,

Figure 3 is an enlarged vertical sectional view showing the triplenozzle employed.

Referring now more particularly to the accompanying drawing, in whichsimilar reference numerals designate similar parts throughout thevarious views, the numeral I indicates the barrel of my gun. The barrel1 is formed with a threaded inner end portion 2 on which is adapted tobe mounted a hose coupling 3, for connecting a hose 4, of conventionalconstruction, said hose leading to a source of Water under pressure. Agasket 5 is mounted in the coupling and serves to prevent leakage frombetween the meeting ends of the barrel and the hose 4.

The barrel I has mounted thereon a cap 6, said barrel extendingdiametrically of said cap and having an opening 1 which is disposedwithin the area of said cap. It should be understood that the cap 6 maybe welded, soldered, or otherwise suitably secured to the barrel. Thecap 6 is internally threaded, as shown at 8.

Mounted in the barrel l is a plug valve 9, said plug valve being locatedso that its lower end extends diametrically through the barrel withinthe area of the cap 6. The valve 9 includes a port Ill and a lever ll,said lever extending laterally above the pipe to cooperate with a scaleplate l2, said scale plate being mounted on the top of said barrel I.The scale plate is marked oif, preferably, to indicate ratios so that itwill be possible for an operator to learn, by referring to the scale,the ratio between water and spraying compound at the nozzle. In otherwords, it will be possible for the operator to regulate the amount ofwater to be mixed with spraying compound in accordance withpredetermined ratios. I

The spraying compound or solution is to be'carried in a container l3which is preferably formed of transparent material and is provided witha slightly constricted threaded neck [4, said neck to be screwed intothe cap 6. The container I 3 has a removable concave bottom l5 which isformed with a filler opening l6, said opening normally being closed by afiller plug l1. Spanner openings l8 are formed in the bottom l5 forpermitting engagement with a spanner wrench when it is desired to removethe bottom to permit removal of the piston presently to be described.

Slidably mounted within the container I3 is a piston l9 which includesupper and lower sections .20 and 2|. The upper section is formed of leador othersuitable heavy metal while the lower section is formed of rubberand is in the shape of an inverted cup washer. It should be understoodthat, while the piston is slidably mounted in the cylinder, said pistonis engaged in said cylinder with suflicient tightness to prevent escapeof Water about its edges.

There is formed in the lower end of the side wall of the containeradischarge opening 22, and extending between said discharge opening andthe forward end of the barrel l is a discharge pipe 23. In the dischargepipe, near its upper end, is a valve 24 which may be adjusted forregulating flow of liquid through the pipe 23. Near the upper end, thepipe 23 is broken, as shown at 25, and the end portions are connected bymeans of a coupling 25. The purpose of breaking the pipes 23 and 25 andemploying the coupling 26 is to permit separation of the ends of thepipe 23 when it is desired to remove the container I3 from the cap 6.

Positioned near the forward end of the barrel l is a mixing element 21which is preferably in the form of a wad or mass of non-rusting metal.It has been found that brass wool serves the purpose effectively. Thepurpose of the mixing element will be set forth hereinafter.

The forward end of the barrel I is internally threaded to receive thenozzle coupling 28, said nozzle coupling, as shown in Figure 3, beingformed with a reduced threaded nippl 29. The nipple 29 is adapted tohave screwed thereOn 0118 of the nozzles of a triple nozzle unit 30. Itshould be understood that the unit 30 is shown by way of example onlyand that single nozzles may be substituted if desired. The use of thetriple nozzle unit 30 assures maximum versatility for the spray gun, asby substituting nozzle units, streams of various sizes may be sprayed.

While the operation of the invention will probably be understood fromthe foregoing, it is thought that a brief description thereof isdesirable.

After the hose 4 has been connected to the barrel 1, and sprayingcompound has been placed within the container l3, below the piston 19,the device is ready for use. In this connection, however, it should beunderstood that the container may be positioned on a fiat surface, forexample, the ground, and the nozzle 30 and nozzle coupling 28 connectedto the forward end of the barrel l by means of a flexible pipe or tubeof any suitable length. Water under pressure is turned into the pipe 4and will pass therefrom into the barrel l. The flow of water will passthrough the opening 1 and flow against the section 20 of the piston [9,for forcing said piston downwardly where- 'by the spraying compound willbe forced through the opening 22 and upwardly through the pipe 23 intothe forward end portion of the barrel l, forwardly of the valve 9, itbeing presumed that the valve 24 is in open position. The valve 9 isadjusted for permitting flow of water from the rear end of said barrelto its forward end, to mix with the spraying compound in said forwardend of the barrel. The mixing element 21 will be effective for assuringthat the spraying compound will be thoroughly mixed with water comingthrough the port In of the valve 9, as explained hereinbefore. The valvelever II is adjustable on the plate l2 for controlling the flow of waterso that the ratio of water to spraying compound may be varied to suitspecific requirements. After passing through the mixing element 21, themixed spraying composition and water will flow through the nozzlecoupling 28 to the nozzle unit 30, where it will flow through thenozzle, to be sprayed on trees, bushes, or the like, for killinginsects. As stated heretofore, a flexible tube of any length may bepositioned between the forward end of the barrel I and the coupling 28so that the container may be mounted in a stationary position.

Attention is called to the fact that, inasmuch as the container I3 is oftransparent material, it will always be possible for an operator to knowjust how much spraying compound remains Within said container. Thespraying compound may be easily placed within the container by removalof the plug ll. When it is desired to remove the piston for cleaning,repair, or any other reason, it is only necessary to remove the bottomwall l5. Of course, the entire container may be removed from the barrelby unscrewing the neck Id of said container from the cap 6, afterloosening the coupling 25.

If, for any reason, it should be desired to spray water alone, as, forexample, for effecting a cleaning operation, the valve 24 may be closedand the valve 9 moved to full open position. Flow of spraying compoundfrom the container [3 will thus be stopped and water will be permittedto flow through the valve.

Having thus described the invention, what is claimed as new is:

In a spray gun, a barrel having a connection for a fluid source, acontainer associated with the barrel, a piston slidable in thecontainer, said container adapted to contain a chemical, a pipeconnecting the container, below the piston, with the barrel, a valve inthe barrel for controlling fiuid flow therethrough, a mixing elementcarried by the barrel near its forward end, said barrel having anopening between the valve and the connection, and means connecting saidbarrel to said container, said opening being adapted to admit fluidunder pressure to the container above the piston and to force the pistonto move within said container whereby the chemical will be forcedthrough the pipe and into the barrel at the other side of the valve,said mixing element effecting mixing of said chemical and fluid passingthrough the valve for forming a spraying solution, said mixing elementcomprising a wad of brass wool.

OSCAR OTTOSON.

